Loading datasets...
License:
CC-BY-NC-SA-4.0
Steward:
Institute of Finno-Ugric/Uralic Studies, University of HamburgDataset ID:
cmn4kxhp8001tnz07jyfvf2qt
Release Date: 3/24/2026
Format: TSV, MP3
Size: 1.29 GB
Share
This dataset is a machine-learning-ready subset of the INEL Nganasan Corpus (Version 1.0), processed specifically for Automatic Speech Recognition (ASR) / Speech-to-Text (STT) training. It translates the highly detailed EXMARaLDA XML annotations into the standard tabular layout utilized by Mozilla Common Voice. The dataset comprises 38 hours and 30 minutes of aligned supervised speech data across 42 speakers. It features demographic metadata where available, and prioritizes Cyrillic transcriptions while falling back to Latin or Phonological tiers to ensure complete text coverage for acoustic modeling.
Licensing
Creative Commons Attribution Non Commercial Share Alike 4.0 International (CC-BY-NC-SA-4.0)
https://spdx.org/licenses/CC-BY-NC-SA-4.0.htmlRestrictions/Special Constraints
The source corpus (Brykina, Maria; Gusev, Valentin; Szeverényi, Sándor; Wagner-Nagy, Beáta. 2025. INEL Nganasan corpus. Version 1.0.) must be cited in all derivative works and research using this dataset.
Forbidden Usage
None
This dataset is a machine-learning-ready subset of the INEL Nganasan Corpus (Version 1.0), processed specifically for Automatic Speech Recognition (ASR) / Speech-to-Text (STT) training under the Mozilla Data Collective initiative. It translates the highly detailed EXMARaLDA XML annotations into the standard tabular layout utilized by Mozilla Common Voice.
Nganasan (ISO 639-3: `nio`) belongs to the Samoyedic branch of the Uralic language family, its closest relatives within the North Samoyedic group being Enets and Nenets. Today, people speaking Nganasan live in several villages in the Taimyr Autonomous District, which is part of the Krasnoyarsk Krai of the Russian Federation.
Nganasan is highly endangered: according to Russian census data from 2010, out of the total population of 807 people, only about 125 speak Nganasan, and there are no speakers under the age of 40.
Language: Nganasan (`nio`)
Total Speakers: 42
Total Audio Clips: 30607 sentences
Total Audio Duration: 38:30:23 (HH:MM:SS)
Audio Format: MP3
The dataset provides audio clips aligned at the sentence level alongside a `train.tsv` metadata file.
The `train.tsv` contains the following Common Voice conforming fields:
`client_id`: Unique speaker abbreviation.
`path`: The filename of the corresponding audio clip.
`sentence`: The primary transcribed text of the audio.
`age`: The calculated age of the speaker at the time of recording.
`gender`: `male` or `female`.
`accents`: Specific dialect information.
`locale`: Locale code (`nio`).
The original corpus contains multiple transcription tiers. To ensure every audio clip has a primary transcription for STT training, the `sentence` column is dynamically populated using a strict fallback hierarchy:
`st`: Source transcription (Cyrillic orthography).
`stl`: Source transcription (Latin script).
`ts`: Phonological transcription (IPA-like characters).
Because the `sentence` field can contain Cyrillic, Latin, or Phonological text depending on the original file's availability, the raw `st`, `stl`, and `ts` columns are also preserved in the TSV. To programmatically determine which alphabet/tier was used for the `sentence` column on any given row, consumers can simply test for equality: `sentence == st`, `sentence == stl`, or `sentence == ts`.
Note: To maintain a streamlined, single-task focus on Speech-to-Text modeling, extensive linguistic annotations such as morphological glossing and secondary translations (English, German, Russian) have been excluded from this specific audio dataset.
The following represents all unique characters encountered in the `sentence` column of this dataset. They are sorted by uppercase, then lowercase, and finally all other symbols:
A B C D E F G H I J K L M N O P R S T U W X Č Ŋ Ÿ Ə Ɂ Ё А Б В Г Д Е Ж З И К Л М Н О П Р С Т У Ф Х Ц Ч Ш Щ Ы Э Ю Я Ӈ Ә Ӡ a b c d e f g h i j k l m n o p r s t u v w y z ð ö ü ÿ č ı ŋ š ǝ ə ɨ ˀ а б в г д е ж з и й к л м н о п р с т у ф х ц ч ш щ ъ ы ь э ю я ё і ң ӈ ә ӡ ӣ ӱ ! " % ( ) * , - . / 0 1 2 3 4 5 6 7 8 9 : ; = ? [ \ ] _ { | } « » ʔ ʼ ́ ̊ ̣ ͡ – — ’ “ ” „ • … ′ №
Created within the long-term INEL project ("Grammatical Descriptions, Corpora and Language Technology for Indigenous Northern Eurasian Languages").
License: CC BY-NC-SA 4.0
Required Citation: If you use this dataset in your research, training runs, or derivative works, please cite the source corpus as follows:
Brykina, Maria; Gusev, Valentin; Szeverényi, Sándor; Wagner-Nagy, Beáta. 2025. INEL Nganasan corpus. Version 1.0. Publication date 2025-05-01. https://hdl.handle.net/11022/0000-0007-FE36-F. Archived at Universität Hamburg. In: The INEL corpora of indigenous Northern Eurasian languages. https://hdl.handle.net/11022/0000-0007-F45A-1